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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>Document</title>
</head>
<body>
    <button id="btn">提交</button>

    <script>
        let btn =document.getElementById('btn')

        function handle(e){
            console.log(this);
            console.log('向后端发请求');
            //将按钮设置成不可点击
            // btn.disabled =true
        }
        btn.addEventListener('click',debounce(handle,1000))

        function debounce(fn,wait){
            var timer =null
            return function(...arg){
                // fn()
                //this
                clearTimeout(timer)
                timer = setTimeout(() =>{
                    fn.call(this,...arg)
                },wait)
            }
        }
    </script>
</body>
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